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RPi

Raspberry Pi 4 boot from usb

# to get vendorId and deviceId
$ dmesg
$ sudo nano /boot/cmdline.txt
usb-storage.quirks=152d:1561:u console=serial0,115200 console=tty1 root=PARTUUID=fcf4cb94-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

Ruby

$ sudo apt-get install rbenv
$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> .bashrc
$ echo 'eval "$(rbenv init -)"' >> .bashrc
$ rbenv
$ git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
$ rbenv install --list
$ rbenv install 2.3.1
$ rbenv global 2.3.1

Server Images 64bit

Convert to server

(
  sudo apt --purge remove -y "x11-*"
  sudo apt --purge -y autoremove
  sudo apt update
  sudo apt upgrade -y
)

Swap

Temporarily Stop Swap

sudo dphys-swapfile swapoff

Modify the size of the swap

sudo nano /etc/dphys-swapfile
CONF_SWAPSIZE=1024

Initialize Swap File

sudo dphys-swapfile setup

Start Swap

sudo dphys-swapfile swapon

References

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